大脳出血例の脳動脈樹脂鋳型標本

METHACRYLATE CASTS OF THE CEREBRAL ARTERIES IN A CASE OF CERE BRAL HEMORRHAGE

I．緒言

　脳動脈の形態学的研究には種々の手法が用いられるが，合成樹脂鋳型標木は立体的な構築を検索するのにもつとも適した方法である。ことに開頭前に頸部の動脈から樹脂を注入し，樹脂がかなり固くなつてから脳を取り出す方法をとれば，死亡直前の頭蓋内動脈の状態を比較的正しく保存することができる。その方法を利用して私どもは今までに基底核および脳幹に分布する動脈の逆行性分岐^6）13），脳の動脈性吻合^9），鋳型標木の球状膨大^10）などについて報告した。

　ここに大脳出血例の樹脂鋳型標本を作成観察する機会を得たのでその所見を報告する。

Cerebral arteries of a 52-year-old man who died of cerebral hemorrhage was studied by methacrylate casts of arterial tree.

During the dissolution of the brain tissue a large hematcma was seen in the right front-parietal re-gion. Right lateral striate arteries were remakably shifted medially and some of the branches formed small resin balls at their peripheral end. These res-in balls might have some relation to intracerebral hematoma.

In the vertebro-basilar system, it was observed that (1) the upper part of the basilar artery was tortuous, (2) the paramedian branches ran caudally in the lower pons, (3) bilateral posterior cerebral arteries were flattend at the part of tentorial notch. These findings might be a result of the expansive supratentorial lesion, and suggest circulatory distur-bance in the lower part of the midbrain and in the upper pons.